A+B×C

 To solve the equation A+B×C, we need to first find the values of A, B, and C.

A+A = 30 => 2A = 30 => A = 15

B+B = 20 => 2B = 20 => B = 10

C+C = 8 => 2C = 8 => C = 4

Now, substitute these values into the equation:

A+B×C = 15 + 10 × 4

= 15 + 40

= 55

So, A+B×C = 55.